An In-Situ Measurement Method of Complex Curved Surface of Blade

Abstract

The invention relates to an in-situ measurement method for a complex curved surface of a blade, and belongs to the technical field of mechanical processing and detection. The method includes the following steps: mounting a laser displacement sensor on the tool plate of a polishing machine tool to perform position alignment of measurement points; adjusting the height of a working table; selecting a group of measurement cross sections at equal intervals in the length direction of the blade; moving the laser displacement sensor to one cross section of the blade through moving the working table along a longitudinal slideway; building polar coordinates, and planning and dividing the measurement cross sections; carrying out equal duration compensation measurement in partial areas, with sparse measurement points, on section lines; measuring other section lines using the same method. According to the method provided by the invention, in-situ measurement of the blade can be carried out on the hybrid polishing machine tool, and points are collected by utilizing the characteristic of non-uniform velocity of the blade, so that the impact of the laser displacement sensor movement on the measurement accuracy is reduced; the position alignment is consistent, so that coordinate conversion of data is avoided, secondary clamping error and auxiliary time are reduced, and the measurement accuracy and efficiency are improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing and detection, and in particular relates to an in-situ measurement method for complex curved surfaces of blades based on a hybrid polishing machine tool. Background technique [0002] With the rapid development of domestic electric power and aviation industry in recent years, the usage of aeroengines, steam turbines, gas turbines, compressors and other equipment has increased sharply. As a key component of these devices, the market demand for blades has also increased significantly. Blades have the characteristics of many types, large quantities, complex curved surfaces, and difficult processing. Its processing quality has a significant impact on the performance and life of the machine. During the finishing process of the blade, multiple measurements and trimming are required to obtain high shape accuracy and surface roughness. Published blade curved surface processing equipment, s...

AI Technical Summary

Problems solved by technology

[0004] The invention provides an in-situ measurement method for the complex curved surface of the blade to solve the problem that the measurement accuracy is heavily dependent on the movement accuracy of the measurement equipment itself because the blade mainly adopts the non-in-situ measurement method at present, and the measuring head adopts point, which is not conducive to ensuring the stability of the measurement accuracy

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